| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Minnie Piper: The Chocolate Cipher | 978-1-84715-083-7 (1-84715-083-7) | 2009 |
| Minnie Piper: The Ladybird Code | 978-1-84715-021-9 (1-84715-021-7) | 2007 |
| Minnie Piper: Undercover Puzzler | 978-1-84715-011-0 (1-84715-011-X) | 2006 |